Ultra-High-Frequency ECG in Cardiac Pacing and Cardiac Resynchronization Therapy: From Technical Concept to Clinical...

Area of Science:

• Cardiology
• Electrophysiology
• Medical Imaging

Background:

• Electrical dyssynchrony significantly impacts cardiac pacing and cardiac resynchronization therapy (CRT) outcomes.
• Ultra-high-frequency electrocardiography (UHF-ECG) offers real-time visualization and analysis of ventricular conduction.
• While high-frequency components in ECG were noted decades ago, their specific application to dyssynchrony is recent.

Purpose of the Study:

• To review the physiological basis of high frequencies in ventricular conduction.
• To explore the clinical evolution and applications of UHF-ECG in cardiac pacing and CRT.
• To highlight UHF-ECG's role in patient selection, therapy optimization, and risk stratification.

Main Methods:

• UHF-ECG records signals from eight precordial leads over multiple cardiac cycles.
• The technique provides instant visualization of ventricular activation patterns.
• Analysis focuses on electrical dyssynchrony and its correlation with clinical data.

Main Results:

• UHF-ECG facilitates patient selection for biventricular CRT and evaluates various conduction system pacing (CSP) methods.
• Electrical dyssynchrony identified by UHF-ECG is linked to clinical outcomes in CRT patients.
• UHF-ECG differentiates electrophysiological characteristics of different CSP techniques.

Conclusions:

• UHF-ECG enables tailored resynchronization strategies (CRT or CSP) based on individual electrical substrates.
• The technology promises optimization of CRT and risk stratification for ventricular arrhythmias.
• UHF-ECG represents a significant advancement in assessing and managing cardiac electrical dyssynchrony.